Detergent formulations with low water content and anti-redeposition polymers

Abstract

A liquid detergent comprising: (a) from 0 to 30 wt % water; (b) from 60 to 90 wt % surfactants; and (c) from 0.5 to 10 wt % of an acrylic polymer comprising from 20 to 50 wt % polymerized units of (meth)acrylic acid and from 50 to 80 wt % polymerized units of a monomer of structure H2C═C(R)CO2(CH2CH2O)n(CH(R′)CH2O)mR″; wherein R is H or CH3, R′ is C1-C2 alkyl; R″ is C8-C22 alkyl or C8-C16 alkylphenyl; n is an average number from 6-30 and m is an average number from 0-10, provided that n≥m and m+n is 6-30.

The invention claimed is: 
     
       1. A liquid detergent comprising: (a) from 0 to 30 wt % water; (b) from 60 to 90 wt % surfactants; and (c) from 0.5 to 10 wt % of an acrylic polymer comprising from 20 to 50 wt % polymerized units of (meth)acrylic acid and from 50 to 80 wt % polymerized units of a monomer of structure H 2 C═C(R)CO 2 (CH 2 CH 2 O) n (CH(R′)CH 2 O) m R″; wherein R is H or CH 3 , R′ is C 1 -C 2  alkyl; R″ is C 8 -C 22  alkyl or C 8 -C 16  alkylphenyl; n is an average number from 6-30 and m is an average number from 0-10, provided that n≥m and m+n is 6-30. 
     
     
       2. The detergent of  claim 1  in which R″ is C 8 -C 18  alkyl and n is from 8 to 20. 
     
     
       3. The detergent of  claim 2  in which the acrylic polymer has no more than 0.1 wt % crosslinker. 
     
     
       4. The detergent of  claim 3  comprising from 1 to 8 wt % of an acrylic polymer. 
     
     
       5. The detergent of  claim 4  comprising from 0 to 20 wt % water. 
     
     
       6. The detergent of  claim 5  comprising from 65 to 86 wt % surfactants. 
     
     
       7. The detergent of  claim 6  in which the acrylic polymer comprises from 23 to 40 wt % polymerized units of (meth)acrylic acid and from 60 to 77 wt % polymerized units of a monomer of structure H 2 C═C(R)CO 2 (CH 2 CH 2 O) n (CH(R′)CH 2 O) m R″. 
     
     
       8. The detergent of  claim 6  in which m is no greater than one and R′ is methyl. 
     
     
       9. The detergent of  claim 8  comprising from 3 to 17 wt % water.